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What is the difference between dynamic and static instruction count?
a. Derive an expression to calculate the user CPU time as a function
of following parameters: the dynamic instruction count (N),
clock cycle per instruction (CPI) and clock frequency (f)b. Explain the reason for choosing ‘dynamic’ instruction count as a parameter in Question 3a
instead of ‘static’ instruction count
The dynamic instruction count is the actual number of instructions executed by the CPU for a specific program execution, whereas the static instruction count is the number of instruction the program has.
We usually use dynamic instruction count as if for example you have a loop in your program then some instructions get executed more than once. Also, in the presence of branches, some instructions may not be executed at all.